Well screen



P 24, J. F. MALONEY' ET 1.

7mm. SCREEN i iled March 15, 1927 2 Sheets-Sheet NVENTOR. z zJ a BY L A TTORNEYS.

p 24, 1929' .1. F. MALONEY ET AL WELL SCREEN Filed March 15, 192'? 2 Sheets-Sheet j INVENTORJ 4 ATTORNEYS.

Patented se e24, 1929 1,729,115.

UNITED STATES PATENT OFFICE JOE F. MALONEY AND STEPHEN P. FARISH, OF HOUSTON, TEXAS WELL SCREEN Application filed March 15, 1927. Serial No. 175,459.

f This invention relates to new and useful Referring now more particularly to the improvements in a well screen. drawlngs, wherein like numerals .of i refer- One object of the inventionis to provide a once designate similar parts [in each 50f the well screen comprising a perforated tubular figures, the numeral 1 designates a tubular support, such as a perforated pipe, and support, preferablya section of pipe. .Each

I screening elements mounted thereon, in a end of this section is threaded as at 2 to renovel manner and so'secured to the pipe and ceivc a connecting collar 3 by means of which to each other as to form avery durable screen a number of the sections may be connected towith ample screening surface. gether if desired. Another object of the invention is to pro- A plurality of lengthwise bars, as 4; are seco vide,'in a well screen, a novel type of screencured to the outside of the section 1 and exing element with novel means for securing tend substantially from end to end of said the same to the perforated tubular support. section. These bars may be secured in place a A further feature of the invention resides by welding their ends to the pipe section and in a novel method of assembling the elements by spot welding them to the pipe, at intervals 05 of a well screen. along their length. The edges of these bars lVith the above and other objects in view 4: are undercut forming facing grooves 55, 5, the invention has particular relation to cerand the opposing edges of these respective tain novel features of construction, arrangebars have the pairs. of opposing oblong 2o ment of parts and method of formation, an notches 6, 6. The end pairs of notches 6 are .70 example of which is given in this specificaprovided to receive the ends of the arcuate tion and illustrated in the accompanying band segments 7, which, when seated in said drawings, wherein notches are Welded therein, and said segments Figure 1 shows a side elevation of a joint or are also welded to the ,pipe section 1.

2 section of the screen, with some of the screen- There are arcuate screening elements 8' 75 ing elements removed. whose ends are formed with offset tenons 9,

Figure 2 shows across sectional view there 9, and these segments, or elements 8, are asof, taken on the line 2-2 of Figure 1. 3 sembled' into the structure of the screen, one

Figure 3 shows a side elevation of one of at a time, by passing the tenons 9 thereof the screening elements, or segments. radially through the notches 6 and then mov- 80 Figure 4 shows an edge view thereof. ing the element 8 lengthwise along the pipe Figure 5 shows a cross sectional view theresection, said tenons 9 moving in the grooves of taken on the line 5-5 of Figure 4. 5 until the screening element first inserted Figure 6 shows aside elevation of a joint, abuts against the band segment 7 and other or section of screen showing another-method screening elements may be similarly inserted 85 of assembling the screening elements, or segin succession and moved along the grooves 5, ments, with some of said elements removed. each element inserted abutting against the Figure 7 shows a cross sectional view therepreceding one until a screening surface is of, taken on the line 7-7 of Figure 6. built up to the pair of notches 6, 6, through Figure 8 shows an edge View of a screening which said. elements have' been inserted. 9O

element employed in this form of screen. Another arcuate band segment, as 10, is then Figures 9 and 10 show side views respecfitted to the pipe section 1, with its ends tively of different types of screening elements seated and welded in said notches 6 and said. employed in this form of screen. I segment 10 may also be spot welded to the Figures 11 and 12 show end views of the pipe section. The corresponding-edge of respective forms of elements shown in Figeach screening element has the spacing lugs ures 9 and 10, and 11 therein which hold the screening elements Figures 13 and 14 show end and edge views spaced a uniform distance apart to form slits respectively of segmental locking bands embetween them and said edges are beveled in- 0 ployed. wardly so that said slits will widen inwardly so that they will not readily clog. It is to be here noted that'the pipe section 1 is perforated, preferably before the bars 4 are secured thereto. In the form shown in Figure 1 these perforations are in the form of circumferential slots 12 and when the screening elements are assembled the slits between them will be located over the respective slots 12.

The work of building up the section 1, of the screen, may be continued, as above described, until the section is completed. The notches 6 cut in opposite edges of any bar 4 may be offset, or in staggered relation, if desired, so as not to unduly weaken said bars.

In the form shown in Figures 6 and 7 the pipe section 1 is shown having perforations 13, 'ather than slots 12, but 'it may be provided with slots if desired.

In this form the lengthwise bars 4 are secured to the pipe section, in the same manner as shown in Figure 1, and are of the same form, having their edges under cut to provide the grooves 5 and their facing edges have the pairs of opposing oblong-notches (3. These pairs of notches are spaced apart, lengthwise of the pipe, and they are provided to receive the ends of the arcuate band segments 14, whichare welded therein and said segments are also spot welded to the pipe section 1. In this form the screening elements 15, 16, extend lengthwise between the respective segments 14 and have the end tenons 17 which fit into the undercut grooves 18 in the adjacent edges of the segments 14. The screening elements 15 have a lengthwise marginal tenon 19 on one side which fits into the undercut groove 5, of the adjacent bar 1 and the element 16 is fitted between the screening elements 15, as shown in Figures 6 and 7. In assembling the screening elements 15, 15, 16, the segment 14, at one end thereof, is not welded into place until after said elements are assembled into proper relation with the segment 14 at the other end of them, and with the adjacent bars 4; and then said segment is welded in place and into interlocking relation with the adjacent end tenons 17. The

screening elements 15 and 16 are suitably spaced apart by the marginal lugs, as 20, carried by them, thus forming slits between them, and their facing edges are suitably beveled inwardly'so that said slits will widen inwardly to lessen the liability of their clogging.

What we i v 1. A well screen including a perforated pipe, bars secured on the outside of the pipe and spaced apart, the facing edges of said bars having pairs of opposing marginal notches, to permit the passage of the ends of screening elements therethrough, series of screening elements on the pipe between said bars, retaining elements between the bars and separating the corresponding series of screening elements, said retaining elements and bars locking the adjacent screening elements in assembled relation, the ends of said retaining elements being seated and secured in the corresponding notches, said screening elements having spaced lugs" between them to hold them in spaced relation.

2. A well screen including a perforated pipe, barssecured on the pipe and spaced apart, the facing edges of said bars having pairs of opposing marginal notches, retaining elements whose respective ends are seated and secured in said notches, screening ele-' bled relation by the band segments and bars,

said screening elements being adapted to simultaneously pass through opposing notches and having their ends secured underneath the corresponding bars.

4. A well screen including a perforated pipe, longitudinal, bars secured on the outside of the pipe and spaced apart, the margins of said bars being undercut to form facing longitudinal grooves, the facing edges of said bars having opposing notches arranged in pairs, screening elements of a length to permit their ends to simultaneously pass through opposing notches, and elements whose ends are seated in said grooves thereby securing said elements on the pipe, arcuate segments secured on the pipe and whose ends are seated in said notches to retain said elements in assembled relation.

5. A well screen including a' perforated pipe, bars secured on the outside of the pipe and spaced apart, the margins of said bars being undercut to form facing longitudinal I grooves, the facing edges of said bars having opposing notches arranged in pairs, screening elements whose ends are formed to pass through opposing notches and seat in said grooves thereby securing said elements on the pipe, arcuate segments secured on the pipe and whose ends are seated in said notches to retain said elements in assembled relation and means for spacing said elements apart to form slits between them.

6. A. well screen including a perforated pipe, longitudinal bars secured on the outside of the pipe and spaced apart, the margins of said bars having pairs .of facing marginal notches, band segments whose ends are seated and secured in the notches of the respective pairs of notches, said bars and segments forming retaining elements, screening elements adapted to be passed through opposing notches, said elements being spaced apart and located between said retaming elements, some of said retaining elements having undercut grooves into which the adjacent ends of ing elements therethrough and the ends of other retaining members being seated and secured in said notches.

In testimony whereof we have signed our names to this specification. 1

JOE F. MALONEY. STEPHEN P. FARISH. 

